ISCO 6700SR, Instruction Manual, Page: 115 / 190

6700SR Refrigerated Sampler
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Memory
The 6700 Sampler contains 128 kilobytes of battery backed RAM
(Random Access Memory) that stores:
• Five sampling programs
• The sampling results from the most recent program
• The rainfall data collected from rain gauges
• Temperature data collected from the Refrigerator Temperature
Sensor
• The data collected from a 700 Series module
• Parameter data collected from a YSI Sonde
• Calculated flow information from the current flow module
The sampling results memory stores up to 1004 events. The pro-
gram run and start time information is logged as four events. These
four entries are held for the duration of the program. The remain-
ing 1000 are for logging sample events, program events, and errors
from the currently running program. If the running program ex-
ceeds 1000 events, the data will “roll-over.” That is, the sampler
will replace the oldest stored event with the newest event. When
using a YSI Sonde the sampler logs two entries at each sample
event. This reduces the sampling results memory to 500 events.
Module, YSI Sonde, Refrigerator Temperature, and rain gauge
readings are stored in memory partitions. The storage capacity de-
pends on the reading types, the number of bytes per reading, and
the data storage interval.
The sampler clears the sampling results memory when the site de-
scription changes. It is important to collect the sampling results be-
fore changing the site description – the data can not be retrieved
afterwards. Keep in mind that the description may change when
selecting an extended program.
The partition data is cleared when the sampler automatically cre-
ates and sizes the memory partitions. This occurs when you:
• Select a new program
• Change the Data Storage Interval in the current program
• Change the programming mode
• Install a new 700 Series Module
• Change 700 Series Module mode of operation
• Add or remove a rain gauge with the Hardware Setup
• Add or remove the Refrigerator Temperature Sensor as I/O3
• Add or remove a YSI Sonde parameter with the Hardware Setup
• Reinitialize the sampler
If you need to collect sampling results and partition data, do this
before allowing the sampler to create and size the partitions. The
stored data is lost as the sampler reformats its memory. As a pre-
caution, the sampler displays the screen below.
INTERVAL CHANGED --
STORED DATA WILL
BE LOST! OK?
YES NO